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The process of melanogenesis from tyrosine
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5,6-dihydroxyindole absorption According acetic acid Acta action activity alkali amino amounts Arch Biochem Biol Biology Biophys brown Cancer catechol Chem chemical chromatography colour compounds containing COOH cuttlefish degradation derived Dermatol determined DOPA effect electron enzyme ether experiments extracted Fattorusso feathers FIGURE FITZPATRICK formation formed fractions Genetics give granules groups growth hair Harley-Mason hormone human humic acids hydrogen indole Invest isolated labelled LERNER malignant melanoma Mason mechanism melanin melanocytes melanogenesis method mouse N.Y. Acad Nature Nicolaus observed obtained occurs oxidation oxygen phenol Physiol Piattelli Pigment Cell plants polymer polyphenol oxidase position precipitate prepared presence Press probably Proc properties protein pyrrole quinone reaction sepiomelanin shown shows skin solution structure substances suggested Swan Table tissue tumors tyrosinase tyrosine units values washed weight yellow yield York